Top 3 ASX Mining Stocks for Upside Potential: Meteoric Resources, Sovereign Metals, Centaurus Metals

American Rare Earths Limited (ARR:AU) has announced a trading halt after a scoping study delivered robust economics and upside potential for its Caldeira rare earth ionic clay project in Brazil. The study estimated in-situ reserves and resources of at least AU$20 billion and the company aims to become the world's lowest-cost producer of rare earths products. Rick Rule, a veteran investor and speculator, has also highlighted Meteoric Resources (ASX:MEI), Sovereign Metals (ASX:SVM,OTCQX:SVMLF), and Centaurus Metals (ASX:CTM,OTCQX:CTTZF) as his top ASX mining stock picks.